# CVE-2026-28806: Improper authorization in device bulk actions and device update API allows cross-organization device control

Status: published. Published: 2026-03-10. Updated: 2026-11-11.

Improper Authorization vulnerability in nerves-hub nerves_hub_web allows cross-organization device control via device bulk actions and device update API.

Missing authorization checks in the device bulk actions and device update API endpoints allow authenticated users to target devices belonging to other organizations and perform actions outside of their privilege level.

An attacker can select devices outside of their organization by manipulating device identifiers and perform management actions on them, such as moving them to products they control. This may allow attackers to interfere with firmware updates, access device functionality exposed by the platform, or disrupt device connectivity.

In environments where additional features such as remote console access are enabled, this could lead to full compromise of affected devices.

This issue affects nerves_hub: from 1.0.0 before 2.4.0.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: EEF) — https://github.com/nerves-hub/nerves_hub_web/commit/1f69c9d595684a4650c3ac702f3dc7c5bcd7526c

## Affected products and versions

- nerves-hub / nerves_hub_web (nerves_hub): ≥ 1.0.0; < 2.4.0 (affected, semver). Source: CNA: EEF
- nerves-hub / nerves_hub_web (nerves-hub/nerves-hub): ≥ 1.0.0; < 2.4.0 (affected, other). Source: CNA: EEF
- nerves-hub / nerves_hub_web (nerves-hub/nerves_hub_web): ≥ adaeefdb7a835525482588f43332ef988cc448c7; < * (affected, git); ≥ 79743ef08f7f801617b653fd09f37c01ed9b4be0; < 1f69c9d595684a4650c3ac702f3dc7c5bcd7526c (affected, git). Source: CNA: EEF

## Severity and prioritization

- CVSS 4.0: 9.4 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H; source: CNA: EEF

- CISA KEV: No listing in collected sources

- EPSS: 0.45% as of 2026-11-10; percentile 39.57%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-285, CWE-668

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-f8fr-mccc-xvcx (CNA: EEF; vendor-advisory, related)

- https://cna.erlef.org/cves/CVE-2026-28806.html (CNA: EEF; related)

- https://osv.dev/vulnerability/EEF-CVE-2026-28806 (CNA: EEF; related)

- https://github.com/nerves-hub/nerves_hub_web/commit/adaeefdb7a835525482588f43332ef988cc448c7 (CNA: EEF; related)

- https://github.com/nerves-hub/nerves_hub_web/commit/79743ef08f7f801617b653fd09f37c01ed9b4be0 (CNA: EEF; related)

- https://github.com/nerves-hub/nerves_hub_web/commit/1f69c9d595684a4650c3ac702f3dc7c5bcd7526c (CNA: EEF; patch)

## Provenance

- CNA: EEF: https://www.cve.org/CVERecord?id=CVE-2026-28806; retrieved 2026-11-11; source updated 2026-11-11

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-28806; retrieved 2026-11-11; source updated Not reported

Revision: 8f60d5bcbb00457332d17a5ce1e630533136a92de4e8663c0b263a18c31892fa

Canonical: https://y2.dev/cve/CVE-2026-28806

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.